Apparatus for cutting channels in parts of footwear



Dec. 3, 1929. F. H. ENNA APPARATUS FOR CUTTING CHANNELS IN PARTS OF FOOTWEAR Filed Aug. 1l. 1927 ai d 44 j 5 Sheets-Sheet 1 Dec. 3, 1929. E. F. H. ENNA 1,737,577

APPARATUS FOR CUTTING CHANNELS IN PARTSr OF FOOTWEAR Filed Aug.11, 1927 3 Sheets sheet 2 j Y j yf Jia f 4f zg H7-- M9 yl 62 6J f6 i 93 9 y f 66 yg 7dr I I,

JM 7 -Jf Dec. 3, 1929, E. F. H. ENNA 1,737,577

APPARATUS 4FOR CUTTING CHANNELS IN PARTS oF FOOTWEAR Filed Aug. l1, 1927 3 Sheets-Sheet 5 pez/67,51??? Zmj/Jzm WT@ M 5? wv Patented Dec. 3, 1929 Unirse s'raras ERNST FREDERIK HENRY ENNA, OF COPENHAGEN, DENMARK APPARATUS FOR CUTTING CHANNELS IN .PARTS OF FOOTWEAR Application filed August 11, 1927, Serial No. 212,280, and in Denmark September 11, 1926.

the damaging influences of light, air, dirt and the like. Moreover, the grooves Serve to increase the effective area of the adhesive surface so that the parts arevery securely united.

The invention further has for its object to f effect the cutting of such grooves in a given part of the work so that the channel shall exactly match a corresponding channel, roughening or abrasion on the other part of the shoe to which it is to adhere.

The invention further has for its object to remove superfluous material from the work so that a preceding or subsequent cutting operation is either unnecessary or is greatly facilitated, and so that two parts to be united are fitted foreach other.

The tool hitherto used for making such a channel generally consists of a series of circular blades provided with sharp teeth, in number corresponding to the width of the channel. The blades are ordinarily fastened on a common shaft so that all move with the same velocity. This arrangement produces a row of parallel grooves along the edge of the work which together form the channel desired. In the case of a sole intended for a more or less pointed shoe, the difficulty is encountered that by turning the work in relation to the cutting device or vice versa, part of the cutter travels in a curve back over the grooves cut into the inner part of the sole, whereby these grooves are ruined and, instead of a row of grooved divisions, a roughened cavity results. This not only weakens the work at this particular spot so that its wearing capacity is considerably diminished, but the roughened cavity is not serviceable for retaining the adhesive.

Vith the machine of this invention a plu rality of cuts are made successively into the work by means of a rotating or rotating and bodily movable tool which forms circular grooves in the bottom of theV channel.

The machine includes a rotary cutter furnished with one or more rows of toothed cutting edges radially arranged. This cutter is made to execute a number of successive cuts (circular recesses) so that part of each cut, for example, one half, is overlapped b the following cut; further the bottom of each recess-in which the said teeth produce concentric circular grooves-is in a plane inclined in relation to the surface of the work so that the depth of each cut gradually di, minishes in the direction in which each cut is overlapped by the subsequent cut.- In this way, in forming each and every cut there is in the part where Vthe preceding cut is overlapped, enough substance in which to form the grooves.

The improved machine makes it possible without any difficulty whatever, to form the desired channelV with a grooved bottom not only when such a channel followsl a straight or a slightly curved line but also when it describes a sharp curve, as for instance when rounding the toe--part of a sole.

The main characteristics of the machine are a cutting device and a feed-mechanism contained in a housing which is suspended from a horizontal pivot so as to swing somewhat like a pendulum. That is to say, the swing is a ternately with and against the feed-direction of the workplaced upon the work table of the machine. lThe housing at all times is in such an inclined position that the cutter-axis and feed-rod parallel to it incline sideways ina direction opposite to that of the feed. W'hen the housing is in its backmost position, the rotary cutter is lowered t0 cut down into the work and a feed rod also is pressed down upon the work so that the feed rod assisted by the continuously rotating cutter carries the work along during the swing of the housing into its foremost position. The feed rod and cutter are adjustable as to height to suit different thicknesses of work and to vary the depth of the cut. At the end of the feed the cutter and feed rod are lifted out of contact with the work and simultaneously a presser foot mechanism automatically engages and holds stationary the work while the housing with the cutter and feed rod swings back t-o its original position.

In the accompanying drawings,

Figure 1 is a sectional front elevation of these improvements.

Figure 2 is an elevation as seen from the left hand side of Figure 1.

Figure 3 is a rear elevation.

Figure 4 is a vertical cross sectional view of Figure 3.

Figure 5 isa horizontal sectional view of Figure 3.

Figure 6 is a sectional plan viewalong line rif-A Figure 2.

Figure 7 is a side elevation of a cutter.

Figure 3 is an inverted plan of Figure 7.

Figure 9is a side elevation showing a. sole with template placed on the worktable of the machine, and a cutter and feed mechanism. in working position.

Figure 10 is a plan ofv a sole partly worked:

upon.

Figure 11 is a longitudinal section on an enlarged scale of a sole which has been openA ated upon by the cutter, the line of the section passing along the groove or channel formed by the cutter.

In Figures 1, 2 and 3, the worktable 1 ofv the machine supports the material to be operated upon. The table rests on a block 2 and can tilt or` turn about an imaginary axis con. tained in the plane yof the'table-top, for this purpose the table has on its bottom a rather broad dovetail rib 3, Figure 2, and the bottom surface is circular or cylindric, the top4 of the block 2, being formed correspondingly to support and guide the table. The. block 2 has an obliquely upwardly extending bracket arm 5, for a purpose hereinafter' described, and rests on a lower part 6 supported by a large vertical pivot 7 which fits into a split socket 9, projecting from the machine body 8. Thel split'socket 9 is tightened around the pivot 7 by means of a screw bolt 11 which is furnished with a nut or nuts 10 soV that the block 2 and table 1 may be helddast at anydesired elevation. i

The block 2 engages the part 6 by means of a dovetail rib 12, Figure 2 so that guidance is obtained horizontally andl perpendicularly to the axis about which the table can turn.

The shifting of the block 2 on theI part 6 is effected by means of a rack 13 and toothed segment 14. The rack 13 is at the lower end and on one side of the block 2, see Figures 2 and 6, and the toothed segment 14i's formed at oneend of alever 15, turning about a pivot 16 upstanding from the lower part 6. The other end of the lever `is forked and en-` gages a pivot v17 which is provided with a head or knob. The pivot 17 stands eccentrically on a circular disc 18 at the head of a shortvertical shaft 19, which passes down through the lower part 6. On the lower end of the shaft 19 is affixed a disc 20, which is connected to a handle 21 by turning which, the disc 2O is turned together with the shaft 19 and the disc 18. Consequently the pivot 17 on the disc 18 turns the lever 15, and the toothed segment 14 meshing with the rack 13, causes the shifting of the block 2 upon the lower part 6.

A treadle (not shown) at the bottom of the machine is connected to the lowerend of a ro-d 23, the upper end ofthe rod being hingedly connected at 24 'to an arm 25 of' a bell-crank lever pivotechto a bracket 2 7 on the block 2. rI lhe other arm of the bell-crank lever is pivot ally connected at28- with one end of alink 29, the other endyofA the link being pivotally connected at 30y with the table 1 vWhen the said. treadle is depressed, the parts 23, 25y and 29- cause thetable 1 to turn anti-clockwise about the imaginary axis aforesaid. Above the pivot 24, the bell-crank lever 2,5, is connected to the lower end ofV a, helical spring 31 the, upper end` ofthe latter being connectedto the machine body to return, the partys 23, 25 and 29 to normal position, when the treadlej is released. Thus the table 1 is automatically returned to normal position..k

On the table 1 is suitably fastened a guide 32 Figures 1 and 3, for the worker for atemplatef supporting the work. Inorder` to` facilitate the feed a, movablel support 10,1,"

Figure 1, hereinafter described, is-inser'ted ,in the table 1.

The machine comprises a knifej 3 3, Figures 1 and 3, for cutting offl superfluous;materialfrom the4 work when this is too large. For

this purpose the work is affixed toV atemplate of correct shape and size andrthat partof the work which overhangs the template is cutA away by the knife 3 3. The knife is secured by a screw 34 to the end of one arm ofl a lever 35 which turns upon` a pivot36 at the upper end of the oblique bracket 5 on the block 2; The other arm of the lever 35 has its end formed as a guide for a slideblock 360. (see Figure 5) bored so as to encircle a stud137` which is affixed to one end of'a rocker lever 39 turning upon a bolt 38. The other end of lever 39 is suitably hinged to the lower end of a vertical rod 41whichpasses through a stationary guide-block 139 Figure 1, and has. on its top end a strap 42 which surrounds an` eccentric 43 on the main shaft` 44. Vith. each. revolution of the main shaft, starting.v from the position shown in Figure 1, the knife 33' has a downward swing to execute a cutting movement followed by an upward swingv The adjustment is such that when the knife has swung down to its lowermost position its. edge is practically inthe imaginary axis ofV tilting or turning of thetable 1. Als the. lever. 35 which. carries the knife is supported bythe bracket 5 upon the block 2, the position oftheY knife in relation to the table 1 'remainsunaltered when the latter is adjusted by theilock 2 sliding uponl the lower part 6. However, its absolute position is altered and this is possible because of the slide-block 86. lVhen the table is turned around its before mentioned horizontal axis, the knife remains in the correct position in relation to the table, because the edge of the knife when swung down is practically speaking in the same axis.

To ensure that the work-piece placed upon the work-table 1 shall not inadvertently be moved, the machine is furnished with va presser foo-t 45, Figures 1, 3 and 5 on one end of a lever 47 rockable on a pivot 46. The other end of lever 47 is iniiuenced by a helical spring 48, -Figure 1, the upper end of which is connected to a lug 49'on the machine body 8, and which iniiuences the lever 47 so as to push the presser foot downwards. To place the work-piece upon the table 1 itis necessary to lift the presser foot, and for this purpose a treadle (not shown) is connected to the lower endv of a rod 51, the upper end being` connected to a vertical slider 52 having an eye H 50 engaging the lever 47 near the point where the spring 48 acts upon this lever. The slider 52 is guided by two bearings 53 and 54 which are fast upon the machine body. lBetween the top bearing 53 and a collar 55 on the slider 52 a helical spring 56 is inserted to balance the weight of the slider 52 and rod 51. On the slider 52 below the lower bearing 54 is aiiixed a stop collar 57 which abuts against this bearing to limit the upward movement of the rod 51 and link 52. When the treadle is pressed downwards the parts 51 and 52 cause the lever 47 to turn to raise the presser foot, at the same time the spring 48 is tensioned and the spring 56 is compressed. As soon as the treadle is released, the spring 48 returns the lever 47 so that the presser foot 45 takes hold of the work-piece placed on the table 1. and simultaneously the spring 56 causes the rod 51 and the link 52 to return to normal position. Movement of the presser foot while the machine is running is automatically regulated through a cam 60 on the main shaft 44 encircled by a ring 59 on the upper end of a rod 58 which passes through the guide member 139 and t-he lower end of which can act upon the presser foot lever 47.

To produce the desired channel in the work and form grooves in the bottom of said channel the machine is furnished with a cutting device and a feeding-mechanism for feeding the work and co-acting with the cutter. These two mechanisms are for the main part contained in a joint housing 61, Figures 1, 2 and suspended so as to turn upon a relatively short horizontal pivot 62 which is partly inserted into and fastened in a bore in the machine frame 8, see especially Figure 1. The housing 61 has on its right hand outside (Figure 1) a rib 63 somewhat prolonged downwards, see also Figure 4, the lower end of which by a. stud 64 forms a hinged connection with one end of a link 65, see especially Figure 2. The other end of the link 65 is hingedly connect-ed by a stud 66 to the end of an upright arm 67, fixed on a horizontal shaft 68 placed at the back of the machine and carried in a pair of bearings 69 on the machine body 8. On the shaft 68 is fastened an arm 70 which is nearly horizontal, Figures 3, 4 and 5, and the end of this arm is connected to a nearly vertical eccentric rod 71, which passes lthrough the guide 139 and has on its upper end a ring or strap 72, Lwhich encircles a `cam 73 on the main shaft 44. /Vhen the machine is ruiming', this cam by means of the rod 71 and the arm 7() causes the shaft 68 to oscillate through a certain angle around its proper axis, and this movement is transmitted through the parts 67 and 65 to the housing 61, so that it swings as a pendulum upon the horizontal pivot 62. The adjustment is such that the longitudinal centre line of the housing 61 passing through the axis of pivot 62 always inclines towards the same side of the vertical.

The cutting device is constructed in the following manner:

In the housing 61, a shaft 75 is mounted so.

as to be revolvable and axially shiftable in its bearings 74. Near the upper end of the shaft there is a bevel wheel 76, which cannot revolve in relation to the shaft although thev latter is siftable through the wheel. The housing prevents any axial shifting of the wheel 76, see Figure 2. The wheels 76 meshes with a larger bevel wheel 77 fastened on an extension 78 (Figure 1) of the main shaft 44. A cutter 79 is fixed to the lower end of the shaft 75 by screw or oth-er means and between the two bearings 74 the shaft loosely passes through a sleeve 80 held in its place upon the shaft between two rings 81 fastened thereon. These rings restrict the axial shifting movements of the shaft and at the same time prevent the shaft and sleeve from being shifted axially in relation to each other.

The construction of the cutter must to some extent depend upon quality of the material to be worked upon, and one suitable construction is shown in Figures 7 and 8. The cutter shown consists of a body mainly cylindric with a screw threaded bore for the lower part of the cutter shaft. The upper part of the said body has a slightly enlarged diameter but is so flattened on opposite sides that in these places two planes 82 are formed to serve for example as a rest or grip for a wrench, when the cutter is screwed on to the cutter shaft. On the lower end of the cutter body radial cutting-edges 83 are formed and provided with saw-teeth, the plane 84 of a tooth being preferablyslightly inclined forwardly in the direction of rotation of the cutter. The rear surface 85 of each cutting edge and the connecting surface 86 between the surface 85 and the front surface 84of theI next cutting edge (sin case there areA several such) or. the merging of the rear surface into` the bottom surface of the cutter body'must. be formed so that the cuttings or chips canY minished and thereby preventedy from causing a heating` of the work suiiicientto damage4 it. For cutting. away the torn. fibres that may appear along the edges ofthe channel cut into the work whenthis isof a loose fibred substance tceth183. are formed around the circumference of the bottom end of the cutter see Figure 8.

The feed'ng mechanism is constructed in the. following.v manner: Between the main lengthof` the shaft 44 andv its reduced eXtension 78, Figure 1, the shaft is `formed as an eccentric 87 encircled byf a sleeve 88V inserted into` the horizontally forked top end of a rod 89, see alsoA Figure 3. This rod p asses down through a guide bearing 9.0 at the top of the housingl. vAt a short` distance underneath the bearing 90 there is a collar 91 screwed or fixed uponthe rod 89; The lower portion of the rrod 89 is loosely encircled by a sleeve .92, which carries a pin S13/that fits intoa short groove 94 in the rodi89. The upper portion of the sleeve, 92 isslightly reducedwhereby,y an annular, shoulder 95, is formed.l Upon this shoulder restsaring supporting:a-,carrier 96 and held fast by a ring 97, which is screwedupon the sleeve 92=above the said ring', A. spring 98 coiled around the rod 89.-is;inserted between the collar 91 and the-ring 97; Thecarrier 96 inclines upw-ardly. from itsri-ng and engages a circular groove cutin the sleeve4 80 so that in this way the feed mechanism and the cutter mechanism are coupled together. The sleeve 92 passes through a guide bearing99 formed in the bottom part of the housing G1 and carries, a feeder `100 at its lower end.l Through theagency of the spring 98 the feeder and the cutter are during` their operating periods, pressed on to the work with a fairly con-stantipressure even if the thickness of the work.variessomewhat in the different parts, inasmuch as the sleeve 92, is to some extent siftable uponA the.` rod 89, either against the action of the spring98 or under influence of same, and the. carrier; 9G forces the cutter shaft 73 to; followv these shifting movements of the sleeve 92. The cutter shaft and the rod 89.,.are. parallelkand, apart from the said possible slight axial. shift of the cutter shaft in relation. to thefrod- Ii 89, the carrier 96 compelsthese two, members to move together axially.

The movable support 101aforesaid .which servesfto aid in feeding the workand is'in-y serted into a cavity ofithe work tablel, has in its lower surface a dovetail igroove which,

engages a corresponding rib 102 formed on the bottom of the said cavity. The support 101 has a strip103, Figure 5, forminga pivot connection with one end of ay lever 105V Figures: 1 and 5, which turns upon a stationary, verticalV pivot: 104.. The. other end of lever. 105 is hingedly connected toone arm of a lever 108 mounted on a vertical pivot 10.7, and the. other arm. of lever 108 is hingedly connectedfby a pin 109 with one end of alink 110 which ispivotally connected at 111, see Figure 4, with the endof an arm 112 projecting upwards from the oscillating shaft 6.8. The-parts;112, 110, 108and 105 thereforecause the movable work support 101 to move forward and backward in time with the swinging of thehousing 61 about its pivot- 62 ands@ thatithefsupport moves -leftor right;

(seen from the leftv side of the machine in Figure 1, see. also Fig-ure when the housing swings lef-t or right. It` is to be observed that leftward movement ofthe support isV in the direction-in-which the .work isfed.

On the main shaft 44- of the machine is pla-ced apulley 113 over which runs abelt (not shown) from a sourceof.v power. The starting and stopping device necessary may be of aknownconstruction andistherefore not mentioned in detail'.Y

The operation of the machine is as follows if.

'After af pieceofgwork- 114,k Figure 9 has been placedupon the movable support 101 of the tablel to ,be operatedupon (in the figure the works is assumed' to be a sole which is still toe large and .tlfierefore' affixed to a template 115), the housing takesia position as. shown in Figure 9. That is, a position in whichthe aX-is-l of the cutter shaft 75 and the axis-ofthe rod 89-w-ith; the sleeve 92 supportingthe feeder 100 incline downwards tothe right, seen from the left side in Figure 1, so tliat.they form an angle of, f'or instance 109 withthe, perpendicular; The eccentric rod- 58 is in its top position so that the presser. foot isdown.l The eccentric rod41 is in its top positionsd that the knife 3.3 iszlifted through thel agency' of the levers-,39,a-nd 35,.v The eccentric rod.7f1 isinearly in,its bottomposition andthrou-gh the agency of the shaft 68, the arm 67 and the link 65 Causes the housing 651 to. take the positionl above mentioned. Tljieeccentric87 on the main shaft 44 is in sucha position thatthe cutter-79 is in contact with .the sole 1x14 throughthe action of they spring 98-Jwhereby the sleeve 92 at this stage is so lifted in relation to the eccentric# rodv 89 that the-pin'93` in the sleeve-is nearly at the ,top en d of the groove 94 in the rod 89. When themachine is started, the following will occurdu-ring onerevolution ofthe main shaft44The camA .60 through the, rod 58 causesthe-.presser foot 45 to swing up and out ofcontactrwith the sole 114. By means ofthe bevel-gears 77 and 76 the cuttershaft the sole 114, whereupon the feeder 100 isV 75 and the cutter 79 are at once made to revolve and the cutter cuts a circular recess into timed to act upon the sole. The housing 61 and the cutter and feed now swing to the left,

Figure 9, during which movement the feeder takes the sole 114 along, assisted by the const-antly rotating cutter. The feeding of the sole is facilitated by the movable support 101 which, through the mechanism 112, 110, 108, 105 and 103 is shifted in exact correspondence to the distance which the sole is to be moved. On account of the inclined position of the cutter, the bottom of the circular recess is cut deeper down in the half foremost in the feeding direction of the sole than in the other half. It is supposed that the cutting edges of the cutter are furnished with sawteeth, and these teeth form circular grooves 116, see Figures 10 and 11, in the bottom of the recess. The swing of the housing 61 to the left and the consequent feed to the left of the sole is only slight, not more so than to make the feed nearly equal to the radius of the critter. In its eXtreme leftward position the cutter shaft 75 still inclines to the right, Figure 9. After the first half revolution of the main shaft 44 the eccentric 87 has lifted the rod 89 with its sleeve 92, and the carrier 96 lifts the cutter shaft 95 with it so that they cutter 79 and the feeder 100 are quite out of contact with the sole 114. At the same time, the eccentric rod 58 is brought into .such a position that the spring 48by acting upon the lever 47 forces the presser foot 45 down upon the sole so as to hold'same fast. During the followinghalf revolution of the main shaft the vhousing 61 the cutter and the feeder swing tothe right back to the starting position, and the eccentric 87 causes the cutter and feeder to return to operating position, so as to repeat the cutting and feeding operation when the housing 61 again swings to the left. The circular recess now cut into the sole overlaps the first recess by about one half. During each revolution of the main shaft, the knife 33 will be swung down and up again so that the knife cuts away the superfluous material of the sole 114, namely, the part of the sole overhanging the template 115.

Thus, a groove or channel is produced in v the sole 114, the sides of which are made up by portions of the outermost grooves of all the circular recesses, and in the bottom of the channel there are groups of circular grooves 116, Figures 10 and 11, produced by the teeth in the cutting edges of the cutter. Each group of grooves, as far as the mode of operation here shown and described is concerned, consists of a number of concentric circular grooves i. e. the number of grooves formed in a single cutting operation. All thekgrooves are distinct and uniform in spite of the fact that part of each of circular recess, excepting, of course, the last one, is overlapped by the next following recess. This result is obtained by using a cutter which inclines in the direction mentioned above. The consequence is that the bottom 118, Figure 11, of each recess is in a plane inclined in relation to the surface of the work at such an angle that the depth, seen in a diametrical vertical section, diminishes in the feed direction of the work. Thus that part of a recess which is overlappedby part of the neXt following recess has less depth than the overlapping part so that the latter is cut into fresh substance of the work. The said inclination further has theeffect that'between each group' of grooves 116 and the next following one there is a proportionately deep segmental step, there being relatively deep grooves or cuts 117 at the foot of each step. This stepf ping will be produced just in the same way, even if the cutter is not toothed, but the steps will then appear as at 119 in Figure 11.

By adjusting the work-table 1, by shifting the block 2 upon the lower part 6, the dis tance from'the outer edge of the groove chan nel to the edge of the finished piece of work is regulated as desired. It will be remembered that the knife 33 follows up this adj ustment of the work-table, because the lever carrying it is suspended upon the bracket 5 on the block 2.

lVhen the workat a certain part has an oblique surface such as may be produced by feathering, and the desired channel hasl to pass along such part, necessary provision for this special case may be made through the feature that the table 1 by means of the parts 23, 25 and 29 which are inter-connected by a treadle is adjusted on the block 2 about the imaginary axis so that the oblique surface-part of the work is brought practically to horizontality. As the knife 33 acts upon a part of the work which lies practically in the said axis, the knife will continue to work correctly.

It is observed that the knife 33 is so curved that it will always cut at a right angle, or nearly so, to'the surface of the work.

Having vnow particularly described andascertained the nature of my said invention, and in what manner the same is to be performed, I declare that what I claim is:

1. In a machine for the purpose described, the combination of means for supporting a shoe-part, and means for producing a series of circular cuts in communicating relation to provide a channel extending parallel to an edge of the shoe-part, each of said circular cuts varying in depth in the direction of the length of the channel.

2. In a machine for the purpose described, the combination of means for suporting a shoe-part, a cutter adapted to form a circular cavity in a shoe part on said support, and means for effecting relative movementbesuccession of cuts in overlapping relation in the direction of the length of the shoepart. Y

3. In a machine for cutting channels in shoe-parts, the combination with a support for the part to be treated, a cutter adapted to cut a circular cavity, means for effecting relative movement between said support and cutter substantially in the direction of the length of the axis of the cutter to bring the cutter into operative relation to a shoe-part on the support, and means for effecting relative movement between the cutter and shoepart whereby successive operations of the cutter will produce overlapping `cavities `in the shoe-part.

. support for causing the cutter to form a channel in a shoe-part on the support, a tem- 4. In a machine for cutting channels in shoe-parts, the combination with a support for the part to be treated, a rotary cutter adapted to cut a circular cavity, mean-s for eecting relative movementbetween the support and cutter substantially in the direction of the Vlength of the axis of the cutter to position the .cutter into and from operative relation to a shoe-part on the support, means for feeding the part to be treated transversely of the axis of the cut-ter, said axis being inclined in -a direction oblique to the line of feed of said part, whereby successive operations of the cutter will produce overlapping cavities lin the shoe-part the bottom of each cavity being inclined in the direction of the feed of the part operated Y 5.A In a machine for the purpose described,

the combination of a support for the part to be treated, arcutter, means for effecting relative movement between the cutter and support for causing the cutter to form a channel in a shoe-part on Vthe support, a template, and means cooperating with the template for giving the channel a predetermined form in the direction of its length.

6. In a machine for the purpose described, the combination of a support for the part to be treated, a cutter, means for eecting relative movement between the cutter and plate. means cooperating with the template for giving the channel a predetermined form in the direction of its length, and a trimmer adapted to remove portions of the part projecting more ,than a predetermined distance from the channel to form an edge parallel with the channel.

7. 'In a machine for thepurpose described, the combination of a support' fora shoe-'part to be treated, a cutter adapted to make a circular eut, means for eifecting relative movement` between the support and cutter i substantially in the direction of the length of the axis of the cutter, means for effecting relative movement between the cutter and a .shoe-.part on :the support in a direction :transverse to the axis of the cutter, and means for preventing movement of the shoepartv when it is not engaged by the cutter.

y8. In a machine for the purpose described,

the combination of a support for a shoe-part to be treated, a cutter, adapted to make a circular eut, supported to rock about a substantially horizontal axis above lthe support, and to be moved to and from position to operate on Aa shoe-part on the support, means for moving the cutter into such operative position .at one end of each oscillation thereof and subsequently moving it from engagement with the part being treated, and means for retaining the shoe-part in position when the cutter is elevated therefrom. A,

9. Ina machine for the purpose described,

.the combination of a support fora shoe-part to be treated, a cutter adapted -to make a circular cut, supported torock about -a substantially horizontal axis above the support, and to be moved to and from positionto operate on a part on the support, means for moving the cutter into such operative position at one end of each oscillation thereof and subsequently moving it from engagement with the part being treated, vand means Vfor effecting relative movement between the cutter and Shoe-part to vfeed the part being treated past the cutter, the axis of the cutter being inclined in a direction opposite that of the said feeding movement. l I y10. In a machine for the purpose described` the combination of a support for `a shoe-part to be treated, a cutter, adapted to `make a circular cut, supported to rock about a'substantially horizontal axis above the support, means for moving the cutter toward and from the support, and means for feeding a shoepart on the support relative to the cutter mounted to move with the cutter toward and from the support.

11. In a machine for the purpose described, the combination of a support for a shoe-part to be treated, a cutter supported to rock about a substantially horizontal axis above the support, adevice for feeding the work relative to the cutter, supported to move with the cutter about said axis,y means for moving the feed device and cutter to and from the work support, and connections between the cutter and feed device whereby the feeding device will bear with uniform pressure on parts of diderent thickness on the support. Y

12. In a machine for t-he purpose described, the combination of a support for a shoe-part to be treated, a frame mounted to rock about a substantially horizontal axis above the support, a power shaft above the holder, an eccentric on said shaft, a rod supported by the swinging frame and connected to the eccentric, a cutter shaft in said frame extending parallell to said rod, gearing connecting the power and cutter shafts, a sleeve on said rod provided with a device for feeding the work relative to the support as the cutter frame is oscillated, a spring acting to press the feed device against the work, and an arm extending from said sleeve and engaging the cutter shaft, whereby the cutter will be moved to and from the work With the feed device.

13. In a machine for the purpose described, the combination of a support for a shoe-part to be treated, a cutter carrying frame mounted to rock about a substantially horizontal axis above the support, a cutter adapted to make a circular cut supported in said frame, a power shaft, an eccentric on said shaft, means actuated by said eccentric for moving the cutter longitudinally of its axis in the frame into and from operative relation to a shoepart on the support, gearing connecting the power shaft and cutter for rotating the cutter, and means actuated by the power shaft for rocking the cutter supporting frame about its axis, for the purpose described.

14. In a machine for the purpose described, i

the combination of a support, a Work table mounted on the support and adapted to be adjusted about an axis lying in the plane of the surface of the table, a cutter supported above said table, and means for feeding a shoe-part over said table in the path of the cutter and on a line substantially parallel to said axis.

15. In a machine for the purpose described, the combination of a support, a work table mounted on the support and adapted to be adjusted about an axis lying in the plane of the surface of the table, a cutter supported to oscillate about an axis above the table, a work holder movable relative to the table to feed a shoe-part to be treated over the surface of the table in the path of the cutter, and means for oscillating the cutter support and reciprocating said holder in unison.

In testimony whereof I have affixed my signature.

ERNST F. H. ENNA. 

